#include"string.h"

void test01()
{
	string s("Hello World");
	s.push_back('aAa');
	cout << s << endl;

	s.append("Hello China");
	cout << s << endl;

	s.insert(4, 5, '*');
	cout << s << endl;

}




int main()
{
	test01();


	return 0;
}